Tube-mill lining.



las

" present Vteierence characters designate ine same tion, of atube mill having; a bol ATEOIVIAS WeCAPENV, MILWAUEE, V'ESCUNSIN, ASSIGNGB TO ALLIS-CHALMERS COIVIPANY, OF MILVIAUKEE, WSCQNSCN, CREQRATIGN 0F' NEW JERSEY.

TUBE-BULL LKNING.

Loa-eines.

'Specieaton of Letters Patented Fel). 3tlg llil Application filed lecember 2, 19M), y Serial No. 595,l82.

To all -uzom it may concern it known that l, Tetonas Wl @nenni a citien of the United States, residing at Milwaukee in the county of lililweulee and State of ,'lliisconsin, llave invented a certain new and useful lmprovement in 'llube-lllill Liningfs, ot which the following is a speciication. y

'This invention relates to improvements in the construction of linings for tube mills suoli as are used for grinding various materials. y

.The object of the invention is to provide a tube null lining which is simple in construction 'and in which the use of fastening mea-ns, suoli as bolts exposed to the interior 0f the mill, is entirely avoided` ln fastening the linings to the interior ot tube mills with bolts or similar means having; their el? apinc' .portions exposed to the grinding' sini'uces` it llas been found that the ciampineT portions after a time Wear oli',

. resulting in loosening of the li ing and pose sible Wrecking of the mill. l the construction of a lining in accordance with the invention the lining fastening means is not exposed to the grinding feurvface of the mill in suoli a way that the deterioration `would have the etleet of loosening the -l 9;., The use of turougn bolts as a fasi means is furthermore ola-- L Y jectionable in that dust, is permitted to escape ronitlie interior tlie mill along` the bolt surfaces. y

A clear conception oft an en'oodiment of the invention can oe obtained lay seterri V to the accompanying dia'vzfingr i which i similar parts.

Figure l 1s an elevation, pas

applied, showing also fragments tl' supporting piers. Fig. 2 is a develoo of several sections of drum vlining simnav that applied in the mill shown in l. Fig. 3 is a vertical transverse sectiontlirouggh a tube mill as shown in Fig. l, tue se t being taken along the line lll-lll ol looking in the direction ot" the arrow n ig; l is an enlarged fragmentary central vertical section of the discharc'e end trunnion and liner therefor,y of the device shown in Figi.,

The tube millv shell or drum, see l, is provided with suitable'manlioles 3? only Y meal. 5 incluses the feed end ot' the mill drum l, and has an outwardly projecting ti'unnion' supported in a suitable bearing mounted on the top ot' a supporting pier ll. The die elia e en lie'ad 1S incloses the discharge end of the drum l and has an outwaidly project-ing trunnion supported in a bearing o mounted on la second supporting pier il. Caps l() incluse the upper halves of the Jfrunnions and prevent grit from injuring the bearings. The driving gear 4: is formed in one with, or is iigidly connected to, the drum l and receives its driving power from vany suitable source, not shown.

end ot' onesection and coacting in a groove Q3 formed in the yend ot' the next adjacent section. '.acii ot the sections 2, as shown Fie'. 2, is provided With a tongue on end thereof and a groove on the oppos end thereof, but the 'sections 2 u y formed with the tongue on each ent section and a groove on each end next adjacent sections, as shown in section 20, see Fig. 2, is ornfieparts, the two parts beingspleen;` ap retained in position by the insetion ot shims i9. The shims 19 may be omitted, shell section 2Q ce formed in one piece and the retaining means loe etlected by shims 2l? as shown diagrammatically in Fig. 2, such construction avoiding the forming of a shell section in a plurality of parts. The use'ot' sninis obviates tine necessity of accurate iittine et' tlie sect` Tneieed an" lcharge end heads 5, 18,- are lined with. a arality of segmental end liners 6 Wlxicli are heldy rigid against tlf# end heads at their outer ends by the' sl sections Q'lining the .drum l, and at their inner ends by the teef/l and discharge trunnion liners 17,' l5, respectively. The end l' liners are formed Wltn tongues ,extendA ing radially from the center'of the mill and coaoting in grooves 8 -formedin' adjacent `end liners 6. It willbe noted .that the diameter of the end liners is slightly less than that of the interior ofv the drum' -1,- thus leaving an annular space around the perfphe-y of the end liners. lThis space is normaily filled with cement or other suitable material which prevents the, liner 'G'from radial displacement away 'from the center The feed trunnion liner 17 coacts against thefeedhead liners '6' along a conical sur-v face, the largest diameter of which is eX-.' l5

posedl to 'the linterior of the `mill v( irum 1. The feed end` clamping bushing 9 has hook shaped proj ections 12, preferably two in number, which extend into recesses '13- ,in thenotches 14.

rI`he discharge trunnion lin-er 15 is provided with the, usual discharge screen, see` Fig. 4, and coacts l with the discharge end head liner 6 along a conical surface having its greatest diameter toward the'interior. of the mill drum l. The discharge clamping bushing 16l has hook shaped projections 12 'extending' int-o recesses 13 of the liner 1,5 in

a manner similar to Ithe arrangement of these elements at the feed end of the mill.

In lining the tube mill the .lining is first applied t'o the end heads and trunnions.v The sections or liners 6 are admitted to theinterior of the mill through the manholes 3 which should .be of -suiiicient'dimensions to permit insertion of all sections of the lining,

and are Iset in position againstthe end heads 5, 18. By forming the outer diameter ofthe end liners 5 slightly less than the inner diamete'r of the drum 1, the insertion and removal-of ,the last liner 6'of a setl or series is easily permitted. After the liners 6 have been assembled, the-trunnionliners 17, 15, are inserted from the interior of the drum 1.

The clamping bushings 9, 16, arenthen inserted from the exterior ofthe mill and are given a partial rotation causing the ends of the hooks 12 to coact along surfaces 24:'v formed in the recesses 13 of ythe trunnion l drum' consisting of a series of portions,la

liner 17, 15. The` surfaces 24 are inclined so that as the hooks 12 are forced forward al rigid locking of the `clamping bushings and trunnion liners is effected. The unfilled portion of the recesses 13 are then filled `with procedure in lining thepinariof eine amm lis to ,begin at either sthe'feed'or discharge end head liners, rings or series of sections 2 beingv inserteduntil-the opposite end head lineris-r'eached. In placing the 'last series of shellsections 2, threeof the sections are rst inserted, there being nothing unusual ',pre"

venting such insertion." 'Il'i'e'4 fourth section of the 'last series could, however, not'lbe 'in-f serted -since the end head of the mill -wouldprevent longitudinal 'shiftingofsuch last'.

section. The section' 2Q is 'thereforeyformed in two parts, the portions forming'the Shell section 20 being inserted coacting along tlie'j drum surface," after which they arespread circumferentially, being fixed ,in this ,position by t-he insertion of liners' or shims' 19.

, Withrthis construction of lining, it will be noted,that thereare nov objectionable through bolts and no portion of the lfast/ning means for the liners isexposed to theinof the lining.

' In actual construction of the lining, oorrugations or 'projections areformed extending longitudinally or` circumferentia'llyv lof;

thel drum '1, but these have 'been .omitted-- from-the disclosure in'thedrawing since a showing of same wouldonly tend to detract fromthe clearnessjf the disclosure. ,These 4corrugationsor projections on the lining are for the purpose of permitting'pebbles' to' lodge in the lining -therebyforming an auf. tomatic protecting lining.

y It should'be understood that it is not desired to be limitedto the exact 4details of construction shown' and described, for obvious modifications will occur to. 'al person skilled in the art.

It is claimed anddesired to secureby 1. In a tube mill, a drum, a lining for said drum consisting of a series of portions, a plurality of wedge shaped sections 'compris-I ing one of said portions, said sections having tongues andfgrooves yon opposite edges there# of, and means for advancingoneof sald sec-- tions along the surface of' said drum'to'se-- cure said sections in place,y said means lying entirely lwithin'said drum7 2. In a tube mill, a drum, a lining for said plurality of sections constitutin each of .ico

said portions, said lsections havlng vedges .normal to said lining surface and yhaving opposite edges mutually tapered, and means for-advancing one of said sections along the n surface ofsaid' drum to secure said sections in place, said means lying entirely Within said drum.

3.,In a tube milllining, a lplurality of segmental sections having interlocking adjacent edges and forming a disk, a bushing concentric With said disk, a drum surrounding said disk,' and a drum lining abutting the edge of the face of said disk, said bush-v ing and sections being formed for preventing displacement of said disk relative to said drum.

4. In a tube mill lining, a trunnion lining bushing, anda clamping' bushing placed end to end with said trunnion lining bushing and interlocking therewith to secure said lining bushing in place Within said trunnion.

5. In a tube mill, a cylindrical drum, and a lining for said drunnsaid lining comprisone of` said sections along the surface of said drum to produce .registration of the tongues of some of the sections with the grooves of adjacent sections, and means for locking said `sections in place, said locking means lying entirely within said drum.l

In 'testimony whereof, I afx my signature 1n the presence of tWo Witnesses.

y THoMAs vv. GAPEN.

Witnesses:

' GHAs. L. BYRON,

W. H. LIEBER. 

